/* /knowledge/backup/ only */
  .kbk-hero {
    min-height: 420px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 104px 40px 54px;
    border-bottom: 1px solid var(--border2);
    background-image:
      linear-gradient(90deg, rgba(10,12,15,.74) 0%, rgba(10,12,15,.52) 48%, rgba(10,12,15,.30) 100%),
      url('/zakupki-banner.png');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
  }

  .kbk-inner {
    position: relative;
    z-index: 2;
    width: min(100%, 1200px);
    margin: 0 auto;
  }

  .kbk-breadcrumb {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .09em;
    margin-bottom: 18px;
  }

  .kbk-breadcrumb a {
    color: #b4bdc6;
    text-decoration: none;
  }

  .kbk-breadcrumb a:hover { color: var(--accent); }
  .kbk-breadcrumb span { color: var(--accent); }

  .kbk-hero h1 {
    font-family: var(--head);
    font-size: clamp(30px, 4vw, 54px);
    line-height: 1.08;
    letter-spacing: -.03em;
    max-width: 920px;
    margin: 0;
  }

  .kbk-hero h1 strong { color: var(--accent); }

  .kbk-hero p {
    max-width: 760px;
    margin-top: 18px;
    color: #d0d5da;
    font-size: 14px;
    line-height: 1.7;
  }

  .kbk-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 44px 40px;
  }

  .kbk-nav-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    margin-top: 26px;
    border: 1px solid var(--border2);
    background: var(--border2);
  }

  .kbk-nav-card {
    min-height: 182px;
    padding: 22px;
    background: var(--bg2);
    color: var(--text);
    text-decoration: none;
    transition: background .2s ease;
  }

  .kbk-nav-card:hover { background: var(--bg3); }

  .kbk-nav-card span {
    font-family: var(--mono);
    color: var(--accent);
    font-size: 11px;
    letter-spacing: .13em;
  }

  .kbk-nav-card strong {
    display: block;
    margin: 14px 0 8px;
    font-family: var(--head);
    font-size: 15px;
    line-height: 1.35;
  }

  .kbk-nav-card p {
    color: #aeb7c0;
    font-size: 12px;
    line-height: 1.6;
  }

  .kbk-topic-wrap {
    max-width: none;
    padding: 0;
    border-top: 1px solid var(--border2);
    border-bottom: 1px solid var(--border2);
    background: var(--bg2);
  }

  .kbk-topic {
    max-width: 1200px;
    margin: 0 auto;
    padding: 44px 40px;
  }

  .kbk-topic + .kbk-topic { border-top: 1px solid var(--border2); }

  .kbk-topic-layout {
    display: grid;
    grid-template-columns: minmax(230px, .42fr) minmax(0, 1fr);
    gap: 38px;
    align-items: start;
  }

  .kbk-topic-title h2 {
    font-family: var(--head);
    font-size: clamp(22px, 2.6vw, 34px);
    line-height: 1.2;
    margin-bottom: 10px;
  }

  .kbk-topic-title h2 strong { color: var(--accent); }

  .kbk-topic-title p {
    color: #aeb7c0;
    font-size: 13px;
    line-height: 1.65;
  }

  .kbk-card-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    border: 1px solid var(--border2);
    background: var(--border2);
  }

  .kbk-card {
    min-height: 148px;
    padding: 20px;
    background: var(--bg);
  }

  .kbk-card span {
    display: block;
    margin-bottom: 8px;
    font-family: var(--mono);
    color: var(--accent);
    font-size: 10px;
    letter-spacing: .11em;
    text-transform: uppercase;
  }

  .kbk-card strong {
    display: block;
    font-family: var(--head);
    font-size: 14px;
    line-height: 1.4;
    margin-bottom: 7px;
  }

  .kbk-card p {
    color: #aeb7c0;
    font-size: 12px;
    line-height: 1.6;
  }

  .kbk-warning {
    max-width: 1200px;
    margin: 0 auto;
    padding: 44px 40px;
  }

  .kbk-warning-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    margin-top: 26px;
    border: 1px solid var(--border2);
    background: var(--border2);
  }

  .kbk-warning-card {
    padding: 24px;
    background: var(--bg2);
  }

  .kbk-warning-card span {
    font-family: var(--mono);
    color: var(--accent);
    font-size: 11px;
    letter-spacing: .12em;
  }

  .kbk-warning-card strong {
    display: block;
    margin: 13px 0 8px;
    font-family: var(--head);
    font-size: 15px;
    line-height: 1.35;
  }

  .kbk-warning-card p {
    color: #aeb7c0;
    font-size: 13px;
    line-height: 1.65;
  }

  .kbk-practical {
    position: relative;
    max-width: none;
    padding: 48px 40px;
    overflow: hidden;
    background-image:
      linear-gradient(90deg, rgba(10,12,15,.86) 0%, rgba(10,12,15,.72) 50%, rgba(10,12,15,.86) 100%),
      url('/zakupki-banner.png');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    border-top: 1px solid var(--border2);
    border-bottom: 1px solid var(--border2);
  }

  .kbk-practical-inner {
    max-width: 1200px;
    margin: 0 auto;
  }

  .kbk-practical-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    margin-top: 26px;
    border: 1px solid rgba(255,255,255,.10);
    background: rgba(255,255,255,.08);
  }

  .kbk-practical-card {
    min-height: 158px;
    padding: 22px;
    background: rgba(10,12,15,.82);
    backdrop-filter: blur(3px);
  }

  .kbk-practical-card span {
    font-family: var(--mono);
    color: var(--accent);
    font-size: 11px;
    letter-spacing: .12em;
  }

  .kbk-practical-card strong {
    display: block;
    margin: 12px 0 6px;
    font-family: var(--head);
    font-size: 14px;
    line-height: 1.4;
  }

  .kbk-practical-card p {
    margin: 0;
    color: #c0c7ce;
    font-size: 12px;
    line-height: 1.6;
  }

  .kbk-related {
    max-width: 1200px;
    margin: 0 auto;
    padding: 44px 40px;
  }

  .kbk-related-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    margin-top: 26px;
    border: 1px solid var(--border2);
    background: var(--border2);
  }

  .kbk-related-card {
    min-height: 180px;
    padding: 24px;
    background: var(--bg2);
  }

  a.kbk-related-card {
    display: block;
    color: var(--text);
    text-decoration: none;
    transition: background .2s ease;
  }

  a.kbk-related-card:hover { background: var(--bg3); }

  .kbk-related-card span {
    font-family: var(--mono);
    color: var(--accent);
    font-size: 11px;
    letter-spacing: .12em;
  }

  .kbk-related-card strong {
    display: block;
    margin: 14px 0 8px;
    font-family: var(--head);
    font-size: 16px;
    line-height: 1.35;
  }

  .kbk-related-card p {
    color: #aeb7c0;
    font-size: 13px;
    line-height: 1.65;
  }

  .kbk-footer-link {
    max-width: 1200px;
    margin: 0 auto;
    padding: 26px 40px 34px;
  }

  @media (max-width: 1000px) {
    .kbk-nav-grid,
    .kbk-practical-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .kbk-topic-layout {
      grid-template-columns: 1fr;
      gap: 22px;
    }
  }

  @media (max-width: 900px) {
    .kbk-hero,
    .kbk-practical {
      background-attachment: scroll;
    }

    .kbk-warning-grid,
    .kbk-related-grid {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 700px) {
    .kbk-hero {
      min-height: 360px;
      padding: 88px 20px 40px;
      background-size: cover;
      background-position: center center;
      background-attachment: scroll;
    }

    .kbk-hero h1 {
      font-size: clamp(28px, 9vw, 42px);
    }

    .kbk-section,
    .kbk-topic,
    .kbk-warning,
    .kbk-related,
    .kbk-footer-link {
      padding-left: 20px;
      padding-right: 20px;
    }

    .kbk-nav-grid,
    .kbk-card-grid,
    .kbk-practical-grid {
      grid-template-columns: 1fr;
    }

    .kbk-nav-card,
    .kbk-card,
    .kbk-practical-card {
      min-height: auto;
    }

    .kbk-practical {
      padding: 38px 20px;
      background-size: cover;
      background-position: center center;
      background-attachment: scroll;
    }
  }